Well, is the default state of an organism not to seek that which is 'good' for it? Is it not seeking to correct deficits, or fulfill desires in the higher forms?
Life constantly needs to be sustained or it will decay and die. The default state of Life is therefore to attempt to keep on living, to seek what is 'good' or sustaining to it. If this was not the default, then Life would not exist as such: the default of the living can hardly be construed as the dead, its opposite.
Our desires are backed by this simple attempt to reach something we conceive as 'good' for us - some perceived or actual need we wish to be filled. Often this is nothing of the sort, an attempt to reach an excess thereof beyond our needs or impinging on the 'good' of others for the sake of our own. This is evil, which by nature is merely excessive attempt toward our perceived 'good' or one inimical to the 'good' of others. Even serial killers kill to feel an emotion or fill a need, trying to chase a 'good' as it were, by perverted means. Evil cannot exist in isolation, only as a mirror or attempt toward the a perceived Good.